P
US8133350B2ActiveUtilityPatentIndex 61

Deinking a cellulosic substrate using magnesium silicate

Assignee: DUGGIRALA PRASAD YPriority: Jul 9, 2008Filed: Jul 9, 2008Granted: Mar 13, 2012
Est. expiryJul 9, 2028(~2 yrs left)· nominal 20-yr term from priority
Inventors:DUGGIRALA PRASAD YMURCIA MICHAEL J
D21C 5/027Y02W30/64
61
PatentIndex Score
2
Cited by
24
References
2
Claims

Abstract

A composition and method for deinking is disclosed. The composition and method contain an activated magnesium silicate or a magnesium silicate.

Claims

exact text as granted — not AI-modified
We claim: 
     
       1. A method of removing ink from a cellulosic containing substance comprising:
 (a) adding to the substance a composition comprising: (1) magnesium silicate, (2) water, (3) xanthan gum, (4) tall oil fatty acid; and (5) sodium lauryl sulfate; 
 (b) optionally excluding adding caustic soda to the cellulosic containing substance; and 
 (c) optionally excluding adding hydrogen peroxide to the cellulosic containing substance. 
 
     
     
       2. The method of  claim 1  wherein the composition is comprised of about 18% of said magnesium silicate; about 0.288% xanthan gum; about 22% tall oil fatty acid; and about 2% sodium lauryl sulfate.

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